A WhatsApp catalogue is useful for quick conversations and product sharing. A website or storefront is better for being found, organizing information, and giving every customer the same reliable details. They solve different problems.
Use the catalogue for active conversations: a customer asks about available colours, you send a product, and you discuss delivery or payment. Use the website for discovery: a customer searches Google, follows a link from a poster, compares services, or wants to understand your business before contacting you.
The two should agree on names, prices, photos, and availability. Link the website or storefront in your WhatsApp profile and use a WhatsApp button on important pages. Do not make a customer request basic information that is already available. A catalogue helps you sell in the conversation; a website helps more people enter the conversation with confidence.